I had to bust out my sewing machine last weekend to put some finishing touches on my Halloween costume. Every time I use it, I wonder, "How on earth does this work?"
Luckily for me, the good people at Bits & Pieces found this helpful animated gif to demonstrate the fascinating process:
Although I can see it with my own eyes, I am still amazed that it works! It's such a mechanical engineering marvel. :) And this technology has stood the test of time: this basic sewing machine function has been in use for over 150 years!